I was looking at my tongue in the mirror the other day, as you do.
"It's rather large, but quite nice", I remarked to Mummy.
"Did you have to pay a lot of money for that tongue?" Mummy asked.
"No! It came free with the rest of me".
"Oh, that's funny", Mummy continued, "I had to pay a lot of money for my tongue."
Silence for a moment as I studied Mummy's face carefully. Yes - a twinkle in the eye; she was joking
"Well actually," I said, considering, "my tongue and my eyes and all the rest of me were free, except for my pink skin which was on special offer in Woolworth's!".